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Modelling informative time points: an evolutionary process approach

Author

Listed:
  • Andreia Monteiro

    (University of Minho)

  • Raquel Menezes

    (University of Minho)

  • Maria Eduarda Silva

    (University of Porto)

Abstract

Real time series sometimes exhibit various types of “irregularities”: missing observations, observations collected not regularly over time for practical reasons, observation times driven by the series itself, or outlying observations. However, the vast majority of methods of time series analysis are designed for regular time series only. A particular case of irregularly spaced time series is that in which the sampling procedure over time depends also on the observed values. In such situations, there is stochastic dependence between the process being modelled and the times of the observations. In this work, we propose a model in which the sampling design depends on all past history of the observed processes. Taking into account the natural temporal order underlying available data represented by a time series, then a modelling approach based on evolutionary processes seems a natural choice. We consider maximum likelihood estimation of the model parameters. Numerical studies with simulated and real data sets are performed to illustrate the benefits of this model-based approach.

Suggested Citation

  • Andreia Monteiro & Raquel Menezes & Maria Eduarda Silva, 2021. "Modelling informative time points: an evolutionary process approach," TEST: An Official Journal of the Spanish Society of Statistics and Operations Research, Springer;Sociedad de Estadística e Investigación Operativa, vol. 30(2), pages 364-382, June.
  • Handle: RePEc:spr:testjl:v:30:y:2021:i:2:d:10.1007_s11749-020-00722-2
    DOI: 10.1007/s11749-020-00722-2
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    References listed on IDEAS

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